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标题：Measurement of T-violating transverse muon polarization in $K^+ \rightarrow \pi^0 \mu^+ \nu$ decay at J-PARC
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作者：S. Shimizu
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We have proposed a new experiment to search for time reversal invariance violation by measuring the transverse muon polarization (PT ) in K+!p0m+n decay at J-PARC. The physics potential in terms of the discovery of new physics along with the power to constrain exotic models is shown to be competitive with other experiments being planned or prepared. The detector system will be an upgraded version of the previous KEK-PS E246 experiment. Major changes are 1) a more highly segmented K+ target, 2) improved charged particle tracking by incorporating state-of-theart GEM detectors, 3) a new readout system for the CsI(Tl) calorimeter with APD, 4) introducing active polarimeters for the muons and decay positrons inside a new muon field magnet. Moreover, a new analysis procedure using arbitary initial muon spin phases at the polarimeter will be applied. These arrangements will improve both the statistical and the systematic errors and should result in an overall error DPT 10−4.